/Engine/Source/Runtime/ApplicationCore/Public/GenericPlatform/GenericPlatformInputDeviceMapper.h
Returns the platform user attached to this input device, or PLATFORMUSERID_NONE if invalid
virtual [FPlatformUserId](API\Runtime\Core\Misc\FPlatformUserId) GetUserForInputDevice ( [FInputDeviceId](API\Runtime\Core\Misc\FInputDeviceId) DeviceId ) const